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As our vision and finding renewable energy is so important for global future, we develop MC4 series power cable. They are one core, double protection and waterproof design. According to our testing, the strict TUV certified 30A/40A working power can be enlarged upto 55A/70A in true flow. Whatever the wind energy or solar application, this ourdoor cable is ideal on your power system as long as the MC4 connector is used. It can be used on your 325W solar panel (10A), battery storage system running 12V100Ah, 24V100Ah, 36V100Ah, 36V200Ah or even 48V system. But, you have to count the total maximum load that shall pass your device, and choose right size for safty purpose.